I have a 2002 Panasonic (PT-56HX41PF) rear-projection, 4:3, HDTV whose blue convergence went out all of a sudden yesterday. I turned it on and the picture was awful. The red and green were fine, but the blue will not converge in the corners or on the sides (converges fine down the middle). Any idea what's going on?
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The three blinks indicates a convergence IC fault. The convergence ICs must be replaced with the manufacturer replacement part. Use only the original replacement part. Your set uses STK392-110 convergence ICs. These ICs are mounted on a large heat sink. Yes, you can replace it yourself and save few hundred bucks. But you must be knowledgeable enough on how to solder, resolder and use a multimeter. You will need:
Heat sink grease or thermal compound
Small side cutter
Feel free to inform me if you decide to replace the ICs yourself
You can get the convergence repair kit at www.tvrepairworld.com which contains the parts and the CD which has the instructions and the service manual on it. You would need the PT53WX53 convergence kit.
The panasonic rear projection convergence repair kit #2 is available for your model at the following link under convergence repair kits which has the ICs and resistors plus detailed instructions. http://servicemanuals.vstore.ca/
you lhave a problem with the convergence IC that control the blue but for the description you made it seems you have no even a slight idea about electronics then my best recomendation is do not mess with it & get some body that does it for you because trying to save some bucks may be costly if you make a mistake think about it
Enter the tip of a pointed knife between the left side edges of the connector (circled in black in the attached pic) and gently tilt the knife away from the connector. Do the same on the right side. The connector should pop up.
most likely the two convergence Ics need to be replaced. They are STK392-110 you can get replacements at the following link with free instalation instructions with pictures. http://servicemanuals.vstore.ca/